Finding the Fourth Proportional to 3,664.75, 5,057.31 and 1,986.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.75 : 5,057.31 = 1,986.16 : x
2. Step 2: Convert to fraction form
   3,664.75/5,057.31 = 1,986.16/x
3. Step 3: Cross multiply
   3,664.75x = 5,057.31 × 1,986.16
4. Step 4: Simplify right side
   3,664.75x = 10,044,626.83
5. Step 5: Solve for x
   x = 10,044,626.83/3,664.75
6. Step 6: Final answer
   x = 2,740.88